<%@ page language="java" contentType="text/html; charset=utf-8"
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<title>Insert title here</title>
</head>
<body>、
<h1>欢迎来到主页</h1>
<form action="index.jsp" method="post">
你已经登录了！点击注销返回登陆页面<input type="submit" value="注销">
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